I suppose if you'd dose sodium nitrate when corals aren't photosynthesizing you could also adjust alkalinity at the same time without it fluctuating throughout the day any more than normal. If i do end up needing to dose I think I might consider that route as well.No. I did it in my tank. The only drawback, IMO, is either you need to manually dose every day, maybe more than once a day, while nitrate dosing is easier to add 5-10 ppm at once.
